Train-pipe valve.



D. C. MITCHELL.

TRAIN PIPE VALVE.

APPLICATiON FILED NOV. 2. 1916.

1 ,240,472 Patented Sept. 18, '1917.

2 SHEETSfSHEET l.

Fia/. A

D. C. MITCHELL.

TRAIN PIPE VALVE.

APPLlCATIoN FILED Nov. 2. 1916.

Patented Sept.v 18, 1917.

v ZSHEETS-SHEET 2.

Summa/ISO@ DAVID C. MITCHELL, OF MONONGAI-IELA, PENNSYLVANIA.

TRAIN-PIPE VALVE.

Specification of Letters Patent.

Patented Sept. 18, 1917.

Application filed November 2, 1916. Serial No. 129,165'.

To aZZ whom t may concern:

Be it known that I, DAVID C. MITCHELL, a citizen of the United States, residing at Monongahela, in the county of lVashington and State of Pennsylvania, have invented certain new and useful Improve ments in Train-Pipe Valves, of which the following is a specification.

This invention relates to train pipe valves and is designed more particularly as an improvement upon the valve forming the subject-matter of my Patent 1,224,176, dated Nov. 7, 1916. It is one aim of the present invention to provide a more substantial connection between the rotating plug of the valve and the operating rod for the said plug, which connection will not be likely to be disturbed because of shocks to which the valve is subjected.

Another aim of the invention is to provide novel means for preventing clogging or fouling of the elements of the device provided for holding the valve in open or closed position.

Another aim of the invention is to provide a valve of this class embodying means for holding the valve in open or closed position and which means will be so constructed and arranged as to be compact and capable of withstanding the shocks and jars to which the valve is subjected under working conditions.

In the accompanying drawings: f

Figure 1 is a perspective Vview of the valve embodying the present invention applied;

Fig. 2 is a view, partly in elevation and partly in longitudinal section, illustrating the said valve in detail;

Fig. 3 is a vertical longitudinal sectional view through the valve;

Fig. 4: is a groupV perspective view of certain parts of the device provided for holding the valve in open or closed position;

Fig. 5 is a perspective view of the valve proper removed from its valve casing;

Fig. 6 is a view in elevation illustrating a slight modification of the invention.`

In the accompanying drawings the valve casing is indicated inV general by thennu'` meral 1 and is of the usual cruci-form shape and has its oppositely located branches 2 and 3 interiorly threaded to receive the ends of the sections of the train pipe, indicated by the numeral 4. The numeral 5 indicates the tapered rotating plug which constitutes the valve proper and which is rotatablyv fitted within the casing 1 and provided with the usual port 6 for the passage of air when the valve is in open position. At its minor end the valve body 5 vis formed with an integral axially extending stem 7, having a threaded portion which is indicated by the numeral 8 and beyond its threaded portion is squared, as indicated by the numeral 9 and formed in its said squared portion with a transverse opening 10. Fitted on to the threaded portion 8 of the stem 7 is a washer 11 and this washer bears against that end of the casing 1 through which the said stem 7 extends, as clearly shown in Fig. 3 of the drawings, a nut 12 and a jam nut 13 being threadedupon the said portion of the stem and the former bearing against the said washer. The .numeral 14 indicates a sleeve, the bore of which is squared at one end, as indicated at 15, so as to iit the squared portion 9 of the stem 7 and a pin 16 is fitted through openings formed at diametrically opposite points in the sleeve 14: and through the said opening 10 for 'the purpose of connecting the sleeve with the stem 7. The bore throughout the remainder of its length may be of cylindrical or rectangular form either as desired and fitted therein is a short rod section, indicated by the numeral 17, the section being preferably secured in place by a transverse pin 18.v

Connected with the' said rod section 17 'by a universal joint 19 is one of two operating rods, indicated by the numeral 20, provided' for the operation of the valve and this rod' extends beneath the car body upon which the valveis mounted and at its outer end is provided with a suitable handle 21 located at the side of the said car body inl position wherey it may be convenientlyv grasped for the purpose of rotating the rod to adjust the valve to open or closed position. 1

A cap 22 is removably threaded on to.I that.

: closed position and will be so held.

end of the valve casing opposite the end through which the stem '7 projects and the valve is provided at itsl corresponding end or, in other words, at its major endy with a stem in axial alinement with the said valve body and with the stem 7 and the said stem 23 projects through an opening 2st formed in the cap 22, and a spring is itted upon the stem 23 and bears at one end against the inner side ot the said cap and at its other end against the major end ot the valve body. The outer portion oit the stem 23 is squared, as indicated by the numeral 26 and formed with an opening 27.

` A cap 22 is formed upon its outer face and surrounding the opening 2i, with an approximately semi-circular boss 23, the ends of which constitute abutment shoulders 29 for a purpose to be presently explained.

rEhe boss 28 is formed at suitable intervals with notches 30 and adapted to seat .interchangeably in these notches is a beveled lug 3l formed upon the end of a sleeve 32 which is provided with a squared bore 33 tting the squared portion 26 of the valve stein 23. The end of the sleeve 32 is further provided with a lug 34rdesigned to coact with the shoulders 29 whereby to limit the rotative movement of the valve and it will be understood that when the lug 3i in engagement in one of the notches 30 the valve will be in open position and will be so held that when the said lug is in engagement in the other one of the notches the valve will be in .l sleeve 35 is provided with a squared bore an this sleeve is tted on to the squared portion :f of the valve stein 23. Bit one end the sleeve is formed with a cylindrical extension which interiorly is of a dia rete-r to more less enacting receive the boss 2S in the manner clearly shown in Fig. 3 ot the drawings, the outer end of the extension 3G complete l.' surrounding the said boss and having its edge located relatively close to the tace ot the cap 22. A spring 3T is fitted upon the sleeve 32 and bears at one end against the enlarged end of the said sleeve and is centered at its other end by a boss 33 formed upon the inner end oip4 the extension It will be understood that normally the spring tends to move the sleeve 32 in the direction of the cap 22 and therefore the lug 31 will be maintained in engagement in one or the other of the notches 30e as the case may he. However, when the valve stem 23v is rotated the lug 3l will ride out of the notch in which it is at that time seated and in doing so the sleeve 32 will be moved away from the cap 22 against the tension. ot the spring 37.y A pin 39 is fitted through the sleeve Y35 and through the opening 27 and serves to secure the vsleeve in place upon the valve stem. The sleeve projects beyond the end: of the portion 26 of the valvel stein 23 and the said projecting portion constitutes a socket in which is fitted a relatively short rod section l0 secured in place by a transverse pin al. The said rod section 40 corresponds to the rod section 117 previously described and has connected with it by a universal joint Ll2, an operating rod 43 corresponding to the rod 20. in that form of the invention shown in Fig. 6 ot the drawings7 instead of operating the valve through the medium of a rod section corresponding to the section 40, a hand wheel 4A is formed or secured upon the end of the sleeve 35 and may be grasped for the purpose ot rotating said sleeve whereby to impart rotary motion to the valve stem 23,. lt will be understood, of course, that while the valve embodying the present invention is designed primarily for use in connection with a train pipe, it may be put to various other uses if desired. lt will further be understood that the extension 36 of the sleeve 35 prevents injury to the spring 37 and prevents clogging or fouling of the notches 30 which would, of course, prevent proper seating of the lug` 31 in the open and closed positions of the valve.

Having thus described the invention7 what is claimed as new is:

l. In a valve of the class described, a cas ing, a valve plug mounted for turning movement in the casing and having a stem, a cap upon one end oil the casing through which the stem extends, a member slidably fitting the valve stem and rotatable therewith7 co.- acting means upon the said cap and the said member for holding the valve in positions oit adjustment7 a member fixed 'upon the valve stem, a spring surrounding the valve 'stem and bearing` between the Erst and last mentioned members whereby to hold the first-mentioned member yieldably in coperative relation tothe said cap, and means carried by the last-mentioned member inclosing the said spring.

2. ln a valve of' the class described. a casing, a valve plug mounted 'for turning movement in the casing and having a stem, a member slidably itted on the stein and rotatable therewith, a locking element iiXed with relation to the easing, a locking element lined with relation to the said member, a member i'iXed upon the valve stem, aspring bearing against the last-mentioned member and also against the lirstementioned member and serving to hold the tirst-mentioned member with the locking elements in cooperative engagement and means carried by the last-mentioned member surrounding and inclosing the said springs and the said loclil ing elements.

3. ln a valve of the class described, a casing, a cap upon one end of the casing, a valve plug mounted for turning movement in the casing and having a stem extending through the capj anapproximately Vcircular boss upon the face of the cap having seating the last mentioned member housing the said notches, a member slidably itted upon the spring and the rst mentioned member and valve stem and having a lug arranged for receiving and housing Within its end the 10 engagement interchangeably in said notches, boss upon the said cap.

5 a member fixed upon the Valve stem, a spring In testimony whereof I aflix my signature.

bearing between the rst and last mentioned members, and a cylindrical extension upon DAVID C. MITCHELL. [L s.]

Copies of this patent may be obtained for ve cents each, by addressing the Commissioner of Patents,

Washington, D. (2. 

